Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks
Many applications and protocols in wireless sensor networks need to know the locations of sensor nodes. A low-cost method to localize sensor nodes is to use received signal strength indication (RSSI) ranging technique together with the least-squares trilateration. However, the average localization e...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-12-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1155/2012/260302 |
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| _version_ | 1850158904937283584 |
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| author | Kezhong Lu Xiaohua Xiang Dian Zhang Rui Mao Yuhong Feng |
| author_facet | Kezhong Lu Xiaohua Xiang Dian Zhang Rui Mao Yuhong Feng |
| author_sort | Kezhong Lu |
| collection | DOAJ |
| description | Many applications and protocols in wireless sensor networks need to know the locations of sensor nodes. A low-cost method to localize sensor nodes is to use received signal strength indication (RSSI) ranging technique together with the least-squares trilateration. However, the average localization error of this method is large due to the large ranging error of RSSI ranging technique. To reduce the average localization error, we propose a localization algorithm based on maximum a posteriori. This algorithm uses the Baye's formula to deduce the probability density of each sensor node's distribution in the target region from RSSI values. Then, each sensor node takes the point with the maximum probability density as its estimated location. Through simulation studies, we show that this algorithm outperforms the least-squares trilateration with respect to the average localization error. |
| format | Article |
| id | doaj-art-667d61edbfe54a54a4fb4869b74e7a3b |
| institution | OA Journals |
| issn | 1550-1477 |
| language | English |
| publishDate | 2011-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-667d61edbfe54a54a4fb4869b74e7a3b2025-08-20T02:23:44ZengWileyInternational Journal of Distributed Sensor Networks1550-14772011-12-01810.1155/2012/260302260302Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor NetworksKezhong LuXiaohua XiangDian ZhangRui MaoYuhong FengMany applications and protocols in wireless sensor networks need to know the locations of sensor nodes. A low-cost method to localize sensor nodes is to use received signal strength indication (RSSI) ranging technique together with the least-squares trilateration. However, the average localization error of this method is large due to the large ranging error of RSSI ranging technique. To reduce the average localization error, we propose a localization algorithm based on maximum a posteriori. This algorithm uses the Baye's formula to deduce the probability density of each sensor node's distribution in the target region from RSSI values. Then, each sensor node takes the point with the maximum probability density as its estimated location. Through simulation studies, we show that this algorithm outperforms the least-squares trilateration with respect to the average localization error.https://doi.org/10.1155/2012/260302 |
| spellingShingle | Kezhong Lu Xiaohua Xiang Dian Zhang Rui Mao Yuhong Feng Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks International Journal of Distributed Sensor Networks |
| title | Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks |
| title_full | Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks |
| title_fullStr | Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks |
| title_full_unstemmed | Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks |
| title_short | Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks |
| title_sort | localization algorithm based on maximum a posteriori in wireless sensor networks |
| url | https://doi.org/10.1155/2012/260302 |
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